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optimized dscal kernel for increment != 1

This commit is contained in:
Werner Saar 2015-05-13 12:14:39 +02:00
parent 02e772c7e4
commit 73f09bf64f
1 changed files with 91 additions and 0 deletions
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91
kernel/x86_64/dscal.c
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@ -81,6 +81,77 @@ void dscal_kernel_8_zero( BLASLONG n, FLOAT *alpha , FLOAT *x )
#endif
void dscal_kernel_inc_8(BLASLONG n, FLOAT *alpha, FLOAT *x, BLASLONG inc_x) __attribute__ ((noinline));
void dscal_kernel_inc_8(BLASLONG n, FLOAT *alpha, FLOAT *x, BLASLONG inc_x)
{
FLOAT *x1;
BLASLONG inc_x3;
inc_x <<= 3;
inc_x3 = (inc_x << 1) + inc_x;
__asm__ __volatile__
(
"movddup (%3), %%xmm0 \n\t" // alpha
"leaq (%1,%4,4), %2 \n\t"
".align 16 \n\t"
"1: \n\t"
"movsd (%1) , %%xmm4 \n\t"
"movhpd (%1,%4,1), %%xmm4 \n\t"
"movsd (%1,%4,2), %%xmm5 \n\t"
"movhpd (%1,%5,1), %%xmm5 \n\t"
"movsd (%2) , %%xmm6 \n\t"
"movhpd (%2,%4,1), %%xmm6 \n\t"
"movsd (%2,%4,2), %%xmm7 \n\t"
"movhpd (%2,%5,1), %%xmm7 \n\t"
"mulpd %%xmm0, %%xmm4 \n\t"
"mulpd %%xmm0, %%xmm5 \n\t"
"mulpd %%xmm0, %%xmm6 \n\t"
"mulpd %%xmm0, %%xmm7 \n\t"
"movsd %%xmm4 , (%1) \n\t"
"movhpd %%xmm4 , (%1,%4,1) \n\t"
"movsd %%xmm5 , (%1,%4,2) \n\t"
"movhpd %%xmm5 , (%1,%5,1) \n\t"
"movsd %%xmm6 , (%2) \n\t"
"movhpd %%xmm6 , (%2,%4,1) \n\t"
"movsd %%xmm7 , (%2,%4,2) \n\t"
"movhpd %%xmm7 , (%2,%5,1) \n\t"
"leaq (%1,%4,8), %1 \n\t"
"leaq (%2,%4,8), %2 \n\t"
"subq $8, %0 \n\t"
"jnz 1b \n\t"
:
:
"r" (n), // 0
"r" (x), // 1
"r" (x1), // 2
"r" (alpha), // 3
"r" (inc_x), // 4
"r" (inc_x3) // 5
: "cc", "%0", "%1", "%2",
"%xmm0", "%xmm1", "%xmm2", "%xmm3",
"%xmm4", "%xmm5", "%xmm6", "%xmm7",
"%xmm8", "%xmm9", "%xmm10", "%xmm11",
"%xmm12", "%xmm13", "%xmm14", "%xmm15",
"memory"
);
}
int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{
BLASLONG i=0,j=0;
@ -91,6 +162,18 @@ int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da, FLOAT *x, BLAS
if ( da == 0.0 )
{
BLASLONG n1 = n & -2;
while(j < n1)
{
x[i]=0.0;
x[i+inc_x]=0.0;
i += 2*inc_x ;
j+=2;
}
while(j < n)
{
@ -103,6 +186,14 @@ int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da, FLOAT *x, BLAS
else
{
BLASLONG n1 = n & -8;
if ( n1 > 0 )
{
dscal_kernel_inc_8(n1, &da, x, inc_x);
i = n1 * inc_x;
j = n1;
}
while(j < n)
{